I call for the need of world leaders to address climate change and reduce the increasing risk of disasters- and world leaders must include mayors, townships and community leaders.

You are here to step into the shoes of UN ambassadors - to draft resolutions, to plot strategy, to negotiate with your allies as well as your adversaries. Your goal may be to resolve a conflict, to cope with a natural disaster or to bring nations together on an issue like climate change. You may be playing a role, but you are also preparing for life. You are acting as global citizens.

The taking of life is too absolute, too irreversible, for one human being to inflict on another, even when backed by legal process. Where the death penalty persists, conditions for those awaiting execution are often horrifying, leading to aggravated suffering.

Nothing is more shameful than attacking sleeping children.

National boundaries these days are not that important because of transformative technological development. Now we are talking about the fourth industrial revolution.

It is up to each and every one of us to raise our voice against crimes that deprive countless victims of their liberty, dignity and human rights. We have to work together to realize the equal rights promised to all by the United Nations Charter. And we must collectively give meaning to the words of the Universal Declaration of Human Rights that "no one shall be held in slavery or servitude"

I call for the need of world leaders to address climate change and reduce the increasing risk of disasters- and world leaders must include mayors, townships and community leaders.